alternatively, and more easy IMO, you could use the FlashRec application (if exploit is not yet fixed on your magic). This app lets you flash Amon_RA's recovery image (or any recovery image) to your phone without having to install Android SDK. You just download Amon_RA's recovery image (for 32A) and put it on your SD card so the app can select the recovery image. If you start the FlashRec app, first make a backup of your standard recovery image (press 'Backup' button). Then type in the location and filename of Amon_RA's recovery. For example, if you put it in the root of your SD card, you should type /sdcard/recovery-RA-sapphire-1.5.2H.img, if the path and filename are correct the 'Flash Recovery' button should become enabled.

You can boot into recovery mode by powering down your phone and restart it by holding both 'Home' & 'Power' buttons until the phone vibrates once. Once in recovery mode you can make a nandroid backup of your current rom. I strongly advise you make a backup before flashing any other rom, this way you can always restore the original rom if things go wrong.

2) Install an engineer SPL:This step is normally not required to flash roms that are made for your current radio version (v3.22). However, if you want to flash newer radio images (required for the latest roms and most likely also for the latest Android versions) this step is required.

Once installed, select English language and continue the setup. If you want to switch to Dutch language you need to download the MoreLocale application from the Android Market.

I'll explain how to prepare your Proximus Magic for flashing in another post.

UPDATE: HTC just made an offical announcement for Europe, stating that SenseUI is now available for non-google branded Magics. You can find the official rom on the HTC Europe site. BEWARE: installing the update from the HTC site will leave your Magic with a perfected SPL, making it nearly impossible to flash other roms. I advise you to install the stock rom (which is identical but comes with an engineering SPL) as explained above.

UPDATE2: And as expected not for Proximus Magics since Proximus is still hibernating. You won't be able to download the rom with your HTC serial *sigh*